There’s something great about game titles that pretty well sum up their experience clearly with their title. One Line Coloring absolutely delivers on that promise, though this isn’t a casual game for the kiddos so much as a puzzle game with simple aesthetics and the challenge of completing each line segment continuously with a single line without ever “picking up your pen”. Even on normal puzzles at times this can be tougher than it sounds and when you add in special challenges layered in like one-way segments the difficulty can be a bit all over the place but it’s a generally pleasant and satisfying way to spend some time if you enjoy these sorts of puzzles.